diff --git a/Casks/swift.rb b/Casks/swift.rb
index 570c9ca342f..9958e33384f 100644
--- a/Casks/swift.rb
+++ b/Casks/swift.rb
@@ -1,18 +1,18 @@
-cask 'swift' do
-  version '4.0.2'
-  sha256 '7fc8ed6911f91f0888b4b9ec3c26df41325cb4d8c2fc588fbacd35a0be7f772b'
+cask "swift" do
+  version "4.0.2"
+  sha256 "7fc8ed6911f91f0888b4b9ec3c26df41325cb4d8c2fc588fbacd35a0be7f772b"
 
   url "https://swift.im/downloads/releases/swift-#{version}/Swift-#{version}.dmg"
-  appcast 'https://swift.im/downloads/swift-stable-appcast-mac.xml'
-  name 'Swift XMPP Client'
-  homepage 'https://swift.im/'
+  appcast "https://swift.im/downloads/swift-stable-appcast-mac.xml"
+  name "Swift XMPP Client"
+  homepage "https://swift.im/"
 
-  app 'Swift.app'
+  app "Swift.app"
 
   zap trash: [
-               '~/Library/Application Support/Swift',
-               '~/Library/Caches/im.swift.Swift',
-               '~/Library/Preferences/im.swift.Swift.plist',
-               '~/Library/Saved Application State/im.swift.Swift.savedState',
-             ]
+    "~/Library/Application Support/Swift",
+    "~/Library/Caches/im.swift.Swift",
+    "~/Library/Preferences/im.swift.Swift.plist",
+    "~/Library/Saved Application State/im.swift.Swift.savedState",
+  ]
 end